Multiscale Modeling of Interfaces, Dislocations, and Dislocation Field Plasticity
Multiscale Modeling of Interfaces, Dislocations, and Dislocation Field Plasticity
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界面、位错和位错场塑性的多尺度建模
DOI：
10.1007/978-3-319-94186-8_5
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
D. McDowell
中科院分区：
文献类型：
--
作者：
D. McDowell
金属材料分级结构的各种尺度范围从纳米到毫米。晶体塑性建模的概念被推广到一组模型构造，这些模型构造解决了与晶体中位错在一系列相应长度尺度上的演变相关的现象，时间尺度范围从fs到几年。这些模型结构包括粗粒原子模型（atomistics），微观相场模型，位错场模型，离散位错动力学，统计连续位错模型，和中尺度广义连续模型的梯度，微极或micromorphic类型，以及局部连续晶体塑性，可以应用于多晶体。我们确定晶格位错的关键现象，并讨论这些是如何映射到各种特定规模的模型构造的能力。并发和分层多尺度模型在空间和时间上的过渡进行了讨论，区分粗粒度和空间域分解方法较低的规模模型。我们专注于中尺度到宏观尺度结构的模型降阶方法。在桥接尺度方面，强调了不同保真度和/或分辨率的模型之间的两个尺度过渡的实际重要性，无论是并发的还是分层的性质。晶体塑性的各种尺度特定的模型被认为是，沿着的例子。本章最后总结了一些长期存在的差距，在晶体和多晶体位错塑性建模。
The various scales of hierarchical structures of metallic materials range from nm to mm. The notion of crystalline plasticity modeling is generalized to a set of model constructs that address phenomena associated with evolution of dislocations in crystals across a range of corresponding length scales, with time scales ranging from fs to years. These model constructs include coarse-grained atomistic modeling (atomistics), microscopic phase field models, dislocation field models, discrete dislocation dynamics, statistical continuum dislocation models, and mesoscale generalized continuum models of gradient, micropolar or micromorphic type, as well as local continuum crystal plasticity that can be applied to polycrystals. We identify key phenomena of lattice dislocations and discuss how these are mapped onto the capabilities of various scale-specific model constructs. Concurrent and hierarchical multiscale model transitions in space and time are discussed, distinguishing between coarse-graining and spatial domain decomposition approaches for lower scale models. We focus on model order reduction methods for mesoscale to macroscale constructs. In terms of bridging scales, the practical importance of two-scale transitions between models of differing fidelity and/or resolution is emphasized, whether of concurrent or hierarchical nature. Various scale-specific models for crystalline plasticity are considered, along with examples. The chapter closes by summarizing some of the long-standing gaps in modeling dislocation plasticity in crystals and polycrystals.
影响因子：
1.6
作者：
T. Hochrainer
通讯作者：
T. Hochrainer
影响因子：
9.8
作者：
Bieler, T. R.;Eisenlohr, P.;Raabe, D.
通讯作者：
Raabe, D.